import router from './router'
import store from './store'
import {Message} from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import {getToken} from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({showSpinner: false}) // NProgress Configuration

// route白名单
const whiteList = ['/login', '/404', '/getImageCode'] // no redirect whitelist


// 路由前置守卫：在路由跳转之前做操作
/**
 * to:到那里去
 * from:从哪里来
 * next:下一步
 */
router.beforeEach(async (to, from, next) => {
  // 进度条开始
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // 如果已经登录就中转到“/”主页去
      next({path: '/'})
      // 注意：中转开启不了router后置守卫，所以：要手动关闭进度条
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // get user info
          await store.dispatch('user/getInfo')
          next()
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

// 路由后置守卫：在路由跳转之后做操作
router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
